ScienceAges 13-15

Ohm’s law

Use V = IR to calculate voltage from current and resistance in a simple circuit. Review suitability for your learners before teaching.

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Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 7 A and has resistance 13 Ω. Use V = IR to find the voltage.
I = 7 A · R = 13 Ω
2. A resistor carries 4 A and has resistance 20 Ω. Use V = IR to find the voltage.
I = 4 A · R = 20 Ω
3. A resistor carries 10 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 10 A · R = 41 Ω
4. A resistor carries 12 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 12 A · R = 18 Ω
5. A resistor carries 7 A and has resistance 38 Ω. Use V = IR to find the voltage.
I = 7 A · R = 38 Ω
6. A resistor carries 6 A and has resistance 19 Ω. Use V = IR to find the voltage.
I = 6 A · R = 19 Ω
7. A resistor carries 8 A and has resistance 45 Ω. Use V = IR to find the voltage.
I = 8 A · R = 45 Ω
8. A resistor carries 4 A and has resistance 40 Ω. Use V = IR to find the voltage.
I = 4 A · R = 40 Ω
9. A resistor carries 7 A and has resistance 39 Ω. Use V = IR to find the voltage.
I = 7 A · R = 39 Ω
10. A resistor carries 1 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 1 A · R = 18 Ω
11. A resistor carries 3 A and has resistance 15 Ω. Use V = IR to find the voltage.
I = 3 A · R = 15 Ω
12. A resistor carries 9 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 9 A · R = 37 Ω

12 questions · Seed 56 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 7 A and has resistance 13 Ω. Use V = IR to find the voltage.
91 V
V = I × R = 7 × 13 = 91 V.
2. A resistor carries 4 A and has resistance 20 Ω. Use V = IR to find the voltage.
80 V
V = I × R = 4 × 20 = 80 V.
3. A resistor carries 10 A and has resistance 41 Ω. Use V = IR to find the voltage.
410 V
V = I × R = 10 × 41 = 410 V.
4. A resistor carries 12 A and has resistance 18 Ω. Use V = IR to find the voltage.
216 V
V = I × R = 12 × 18 = 216 V.
5. A resistor carries 7 A and has resistance 38 Ω. Use V = IR to find the voltage.
266 V
V = I × R = 7 × 38 = 266 V.
6. A resistor carries 6 A and has resistance 19 Ω. Use V = IR to find the voltage.
114 V
V = I × R = 6 × 19 = 114 V.
7. A resistor carries 8 A and has resistance 45 Ω. Use V = IR to find the voltage.
360 V
V = I × R = 8 × 45 = 360 V.
8. A resistor carries 4 A and has resistance 40 Ω. Use V = IR to find the voltage.
160 V
V = I × R = 4 × 40 = 160 V.
9. A resistor carries 7 A and has resistance 39 Ω. Use V = IR to find the voltage.
273 V
V = I × R = 7 × 39 = 273 V.
10. A resistor carries 1 A and has resistance 18 Ω. Use V = IR to find the voltage.
18 V
V = I × R = 1 × 18 = 18 V.
11. A resistor carries 3 A and has resistance 15 Ω. Use V = IR to find the voltage.
45 V
V = I × R = 3 × 15 = 45 V.
12. A resistor carries 9 A and has resistance 37 Ω. Use V = IR to find the voltage.
333 V
V = I × R = 9 × 37 = 333 V.

12 questions · Seed 56 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Take your time. Show your thinking.

1. A resistor carries 7 A and has resistance 13 Ω. Use V = IR to find the voltage.
I = 7 A · R = 13 Ω
2. A resistor carries 4 A and has resistance 20 Ω. Use V = IR to find the voltage.
I = 4 A · R = 20 Ω
3. A resistor carries 10 A and has resistance 41 Ω. Use V = IR to find the voltage.
I = 10 A · R = 41 Ω
4. A resistor carries 12 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 12 A · R = 18 Ω
5. A resistor carries 7 A and has resistance 38 Ω. Use V = IR to find the voltage.
I = 7 A · R = 38 Ω
6. A resistor carries 6 A and has resistance 19 Ω. Use V = IR to find the voltage.
I = 6 A · R = 19 Ω
7. A resistor carries 8 A and has resistance 45 Ω. Use V = IR to find the voltage.
I = 8 A · R = 45 Ω
8. A resistor carries 4 A and has resistance 40 Ω. Use V = IR to find the voltage.
I = 4 A · R = 40 Ω
9. A resistor carries 7 A and has resistance 39 Ω. Use V = IR to find the voltage.
I = 7 A · R = 39 Ω
10. A resistor carries 1 A and has resistance 18 Ω. Use V = IR to find the voltage.
I = 1 A · R = 18 Ω
11. A resistor carries 3 A and has resistance 15 Ω. Use V = IR to find the voltage.
I = 3 A · R = 15 Ω
12. A resistor carries 9 A and has resistance 37 Ω. Use V = IR to find the voltage.
I = 9 A · R = 37 Ω

12 questions · Seed 56 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Answers and reasoning. Review before teaching.

1. A resistor carries 7 A and has resistance 13 Ω. Use V = IR to find the voltage.
91 V
V = I × R = 7 × 13 = 91 V.
2. A resistor carries 4 A and has resistance 20 Ω. Use V = IR to find the voltage.
80 V
V = I × R = 4 × 20 = 80 V.
3. A resistor carries 10 A and has resistance 41 Ω. Use V = IR to find the voltage.
410 V
V = I × R = 10 × 41 = 410 V.
4. A resistor carries 12 A and has resistance 18 Ω. Use V = IR to find the voltage.
216 V
V = I × R = 12 × 18 = 216 V.
5. A resistor carries 7 A and has resistance 38 Ω. Use V = IR to find the voltage.
266 V
V = I × R = 7 × 38 = 266 V.
6. A resistor carries 6 A and has resistance 19 Ω. Use V = IR to find the voltage.
114 V
V = I × R = 6 × 19 = 114 V.
7. A resistor carries 8 A and has resistance 45 Ω. Use V = IR to find the voltage.
360 V
V = I × R = 8 × 45 = 360 V.
8. A resistor carries 4 A and has resistance 40 Ω. Use V = IR to find the voltage.
160 V
V = I × R = 4 × 40 = 160 V.
9. A resistor carries 7 A and has resistance 39 Ω. Use V = IR to find the voltage.
273 V
V = I × R = 7 × 39 = 273 V.
10. A resistor carries 1 A and has resistance 18 Ω. Use V = IR to find the voltage.
18 V
V = I × R = 1 × 18 = 18 V.
11. A resistor carries 3 A and has resistance 15 Ω. Use V = IR to find the voltage.
45 V
V = I × R = 3 × 15 = 45 V.
12. A resistor carries 9 A and has resistance 37 Ω. Use V = IR to find the voltage.
333 V
V = I × R = 9 × 37 = 333 V.

12 questions · Seed 56 · Age guidance, not curriculum certification